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Northern Tornadoes Project 🇨🇦 @westernuntp.bsky.social · 1d

Yes, we are developing several different types of wind estimation tools that can be used in cases where the traditional EF scale can’t or is limited. Expect progress on that in the off-season.

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Northern Tornadoes Project 🇨🇦 @westernuntp.bsky.social · 2d

NTP partner 'The Weather Network' also has an article on the Enderlin, ND EF5 tornado that the NTP helped to rate. www.theweathernetwork.com/en/news/weat...

The U.S. sees its first EF-5 tornado in more than 4,400 days - The Weather Network

A violent, EF-5 tornado struck Enderlin, N.D., on June 20, 2025--the first instance of a twister given that designation in the U.S. since the Moore, Okla., event in May 2013.

www.theweathernetwork.com

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Northern Tornadoes Project 🇨🇦 @westernuntp.bsky.social · 2d

Good New York Times article on the upgrade to EF5 - mentioning that the Northern Tornadoes Project was called upon to assist. Gift article link so should be fully accessible.

www.nytimes.com/2025/10/06/w...

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Northern Tornadoes Project 🇨🇦 @westernuntp.bsky.social · 2d

The CSSL/NTP assisted the US National Weather Service (NWS) with their upgrading of the official rating of the June 2025 Enderlin, ND tornado from EF3 to EF5.

Announced by the NWS today, it’s the first EF5-rated tornado in the US since 2013.

Details here: uwo.ca/ntp/blog/202...

Image B. Emfinger

Drone photo courtesy Brian Emfinger and used with permission.

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Reposted by Northern Tornadoes Project 🇨🇦

Connell Miller @connellmiller.ca · 3d

Excited to announce that my method for estimating wind speeds based on lofted debris in tornadoes was used as contextual evidence for upgrading the Enderlin, ND tornado to an EF5!

doi.org/10.1175/MWR-...

#NDwx #Enderlin #EF5 #Tornado

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Northern Tornadoes Project 🇨🇦 @westernuntp.bsky.social · 6d

The first forested area to be searched with NTP's new AI tool - Northern Ontario east of Lake Superior - turned up five tornadoes, including one rated EF2. These were all manually verified and documented.

Details here:

uwo.ca/ntp/blog/202...

#ONstorm

Lots more to come...

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Northern Tornadoes Project 🇨🇦 @westernuntp.bsky.social · 6d

Today we have a special blog post on a new NTP tool for AI-assisted satellite review, with the method described by its developer - the NTP's Daniel Butt. The tool is being used experimentally and is already producing results. More on that shortly!

uwo.ca/ntp/blog/202...

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Northern Tornadoes Project 🇨🇦 @westernuntp.bsky.social · 7d

Following a thorough satellite review for storm tracks of interest, the NTP has confirmed three new EF1 tornadoes from earlier in the season in Quebec.

The first two occurred on April 29 and the third on June 23.

Details at:

uwo.ca/ntp/blog/202...

#meteoQC

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Northern Tornadoes Project 🇨🇦 @westernuntp.bsky.social · 7d

The NTP has confirmed three new tornadoes and upgraded a downburst damage rating in Northern Ontario.

Details here:

uwo.ca/ntp/blog/202...

#ONstorm

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Northern Tornadoes Project 🇨🇦 @westernuntp.bsky.social · 8d

The NTP has confirmed four EF2 tornadoes in western Quebec during the late afternoon and evening hours of September 5. In each case there was considerable tree damage.

Full details can be found here:

uwo.ca/ntp/blog/202...

#meteoQC

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Reposted by Northern Tornadoes Project 🇨🇦

Dave Sills 🌪️🎶⚓ @davesills.ca · 23d

New paper alert!

"Multi-Level In-Situ Measurements During a Direct Hit by a Significant Tornado" in A-O.

Observations from a 2010 F2 tornado at a Harrow, ON-area wind farm show that peak winds do increase closer to the ground, supporting DOW radar measurements/analysis.

doi.org/10.1080/0705...

Multi-Level In-Situ Measurements During a Direct Hit by a Significant Tornado

A rare direct hit by a significant tornado on a weather station is documented, with a peak 1-s wind gust of 53.1 m/s (191.2 km/h) and a surface pressure deficit of 16.0 hPa recorded. Even more unco...

doi.org

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Reposted by Northern Tornadoes Project 🇨🇦

Dave Sills 🌪️🎶⚓ @davesills.ca · Sep 8

With the 10 tornadoes added today from past months, the 2025 national tornado count goes to 66. Which is tied for 2017 at this point in the season for the *least* number of tornadoes since NTP began in 2017. And is almost half of what Canada experienced last year.

Will be looking into the why...

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Northern Tornadoes Project 🇨🇦 @westernuntp.bsky.social · Sep 8

An additional 4 tornadoes have been confirmed by NTP for Quebec from June based on satellite imagery review. There was 1 EF2 tornado and 3 EF1 tornadoes.

Details at the NTP blog here: uwo.ca/ntp/blog/202.... Tornadoes are plotted on a regional map below.

#meteoQC #QCstorm

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Northern Tornadoes Project 🇨🇦 @westernuntp.bsky.social · Sep 8

The NTP has confirmed an additional 6 tornadoes for the Prairie provinces based on witness reports - 2 in AB, 3 in SK and 1 in MB. An EF0-Default rating is assigned for each since no damage was reported or detected.

See the NTP blog for details: uwo.ca/ntp/blog/202...

#ABstorm #SKstorm #MBstorm

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Northern Tornadoes Project 🇨🇦 @westernuntp.bsky.social · Sep 2

The NTP has confirmed three tornadoes over Lake Erie from the evening of August 28.

See here for details: uwo.ca/ntp/blog/202...

#ONstorm

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Northern Tornadoes Project 🇨🇦 @westernuntp.bsky.social · Aug 30

The NTP has confirmed three new tornadoes in southern AB from June, all rated EF0-Default.

Details at uwo.ca/ntp/blog/202....

#ABstorm

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Northern Tornadoes Project 🇨🇦 @westernuntp.bsky.social · Aug 28

The NTP has confirmed that a downburst (paired with large hail) caused high-end EF1 damage in the Brooks, AB area on August 20.

Details at the NTP blog here: uwo.ca/ntp/blog/202...

Note that ongoing analysis may result in additional events and/or a rating upgrade.

#ABstorm #SKstorm

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Northern Tornadoes Project 🇨🇦 @westernuntp.bsky.social · Aug 28

The NTP has confirmed two EF1 downbursts (one being a microburst), an EF0 tornado and a gustnado from the SK storms of Aug 20 near Saskatoon.

The assessments are based on witness reports, an NTP damage survey, and radar/satellite imagery analysis.

Details here: uwo.ca/ntp/blog/202...

#SKstorm

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Northern Tornadoes Project 🇨🇦 @westernuntp.bsky.social · Aug 26

The NTP has confirmed four additional tornadoes over water (waterspouts) that occurred in the Canadian waters of the Great Lakes in August.

See the following for details:

uwo.ca/ntp/blog/202...

#ONstorm

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Northern Tornadoes Project 🇨🇦 @westernuntp.bsky.social · Aug 26

The NTP has confirmed three EF2 tornadoes that occurred in NE Ontario near Englehart on July 12.

Satellite imagery was used to identify the tracks of significant tree damage.

Details at uwo.ca/ntp/blog/202...

#ONstorm

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Reposted by Northern Tornadoes Project 🇨🇦

Canadian Severe Storms Lab @cssl.ca · Aug 21

UPDATE: Two NTP teams will investigate wind damage, one in SE AB and one in central SK. The NHP will also have a team investigating hail damage in the Cassils / Brooks, AB area.

Please send significant damage reports to @ntp-reports.bsky.social and @nhp-reports.bsky.social. #ABstorm #SKstorm

Northern Tornadoes Project 🇨🇦 @westernuntp.bsky.social · Aug 21

There are numerous reports of significant wind damage in southeastern Alberta from intense storms earlier today. Hail damage has also been reported.

An NTP survey team will leave tomorrow for the area to thoroughly assess the damage.

Please send damage reports to @ntp-reports.bsky.social. #ABstorm

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Northern Tornadoes Project 🇨🇦 @westernuntp.bsky.social · Aug 21

There are numerous reports of significant wind damage in southeastern Alberta from intense storms earlier today. Hail damage has also been reported.

An NTP survey team will leave tomorrow for the area to thoroughly assess the damage.

Please send damage reports to @ntp-reports.bsky.social. #ABstorm

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Northern Tornadoes Project 🇨🇦 @westernuntp.bsky.social · Aug 20

Following a damage survey in the Wheatley, ON area, NTP has confirmed that a microburst caused EF0 damage early on August 17.

The max wind speed is estimated to be 130 km/h but the damage was very localized.

Details can be found at the NTP blog here: uwo.ca/ntp/blog/202...

#ONstorm

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Northern Tornadoes Project 🇨🇦 @westernuntp.bsky.social · Aug 18

Today’s early morning storms in SW Ontario caused isolated wind damage in the Wheatley area. A large drive shed had its roof removed.

An NTP survey team will leave for that area Monday morning to investigate.

When results are available, you'll see a link to them here. #ONstorm

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Northern Tornadoes Project 🇨🇦 @westernuntp.bsky.social · Aug 8

The NTP has confirmed Ontario's first recorded EF2 tornado of the year. It occurred in NW ON on July 27. High-resolution satellite images were used to identify and assess the damage path through the forest.

Details here: uwo.ca/ntp/blog/202...

#ONstorm

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